you're allowed to feel angry. it's an emotion that is part of our being human.
usually means your boundaries are being crossed in ways that you don't like, anger is there to put up the flag and make you take notice.
you don't LIKE this.
you get to feel your feelings.
you don't have to like it. it might be another red flag for you, your inner self telling you to move on? sometimes its really difficult to just keep accepting the truth in a given circumstance. keep feeling what you need to feel, reveal your truth, let it out and find someone to help you process it. sometimes we think we know why we are feeling something when the truth really lies just under the next layer.
stay with your anger and explore it...give it the freedom to tell you what it is trying to express.